The density of liquid oxygen is 1140 kg / m3, which is equal to the mass of 800 liters of liquid oxygen.

Given:

ro = 1140 kilograms per cubic meter is the density of liquid oxygen;

V = 800 liters – the volume of liquid oxygen.

It is required to determine what the mass m (kilogram) of liquid oxygen of volume V is equal to.

Let’s convert the units of measurement of volume to the SI system:

V = 800 liters = 800 cubic decimeters = 800 * 0.001 = 0.8 cubic meters.

Then the mass of liquid oxygen is equal to:

m = ro * V = 1140 * 0.8 = 912 kilograms.

Answer: The mass of 800 liters of oxygen is 912 kilograms.